Spatiotemporal coupling and spatial effects of ecosystem services and human well-being in Poyang Lake Basin

Abstract

[Objective] Achieving the coupling coordination of ecosystem services and human well-being is crucial for the development of regional ecological civilization. [Methods] By establishing an evaluation index system of human well-being, the spatiotemporal coupling coordination relationship and spatial effects in the Poyang Lake Basin from 2005 to 2023 were analyzed by using the modified equivalent factor method, coupling coordination degree model, and spatial econometric model. [Results] (1) During the study period, the Poyang Lake Basin was in the stage of “fluctuating decline in ecosystem service values and continuous improvement in human well-being”. The coupling coordination degree increased from 0.393 to 0.531, transitioning from moderate imbalance to coordination, with a spatial distribution of higher values in the north and lower values in the middle.(2) The coupling coordination degree showed significant positive clustering, with spatial correlation showing a trend of initial decrease, followed by an increase, and then another decrease. Overall, high-value clustering remained relatively stable, while low-value clustering shifted: high-value clustering types were mainly distributed around Poyang Lake, while low-value clustering types shifted from the vicinity of Yingtan City to industrial-focused districts and counties such as Ruichang City and Anyi County, with an expansion trend around the Yichun City area.(3) The increase in local coupling coordination degree was primarily influenced by positive spillover effects of vegetation quality, industrial structure, industrial development, government intervention, and economic vitality in neighboring districts and counties. Direct effects of industrial structure, industrial development, and economic vitality also contributed, while vegetation quality and government intervention had negative effects on the local coupling coordination development. [Conclusion] From 2005 to 2023, the overall coupling coordination in the study area has improved steadily. In the future, efforts should focus on mitigating the negative effects of government intervention and vegetation quality on local coupling coordination development. Additionally, achieving integrated improvement in the coupling coordination development of the Poyang Lake Basin can be facilitated by adjusting industrial structure and promoting industrial development.

Keywords

Poyang Lake / ecosystem services / human well-being / coupling coordination / spatial effects / influencing factors